We want our customers to support their local dealers — and we’re always looking for new partners who share our commitment to quality.
Choose Your Rifle Platform
The DOC Mitchell Defense rifles are for those who value accuracy, durability and reliability in their AR15 platform. The proprietary buffer system, enhanced BCG, and thermal fit barrel produces a weapon system that is extremely flat shooting with very little recoil, insanely accurate, and beyond the industry standard for reliability. An independent endurance test demonstrated their resilience, firing 17,554 rounds without cleaning or lube with no failures. Check it out for yourself.
The Rat Dog Mitchell Defense rifle was meticulously crafted to be the epitome of reliability and functionality. It was designed to excel in the most demanding conditions, ensuring you stay in the fight, no matter how dirty or tired. This PCC features a specially designed two-stage trigger that can withstand the increased stress exerted by a blowback gas system, providing unrivaled durability and consistent performance. The enhanced buffer system works harmoniously with the BCG to deliver an exceptionally reliable and enjoyable shooting experience.
The “PipeHitter” Line of Mitchell Defense rifles is our spin on the AR10 Platform. Built in the popular DPMS footprint and chambered in 308, 6.5 CM, and 8.6 BLK with a variety of barrel lengths. Reliability, durability and accuracy are still be backbone of these rifles. Utilizing the AR10 version of the proprietary buffer system, precision ground BCGs and precision barrels these rifle excel in what they are designed to do. No matter if you are a long range shooter or needing bear protecting in Alaska we have you covered. Check out all the options we have!
The DOC rifles are for those who value accuracy, durability and reliability in their AR15 platform. The proprietary buffer system, enhanced BCG, and thermal fit barrel produces a weapon system that is extremely flat shooting with very little recoil, insanely accurate, and beyond the industry standard for reliability. An independent endurance test demonstrated their resilience, firing 17,554 rounds without cleaning or lube with no failures. Check it out for yourself.
The Rat Dog rifle was meticulously crafted to be the epitome of reliability and functionality. It was designed to excel in the most demanding conditions, ensuring you stay in the fight, no matter how dirty or tired. This PCC features a specially designed two-stage trigger that can withstand the increased stress exerted by a blowback gas system, providing unrivaled durability and consistent performance. The enhanced buffer system works harmoniously with the BCG to deliver an exceptionally reliable and enjoyable shooting experience.
The “PipeHitter” Line of rifles is our spin on the AR10 Platform. Built in the popular DPMS footprint and chambered in 308, 6.5 CM, and 8.6 BLK with a variety of barrel lengths. Reliability, durability and accuracy are still be backbone of these rifles. Utilizing the AR10 version of the proprietary buffer system, precision ground BCGs and precision barrels these rifle excel in what they are designed to do. No matter if you are a long range shooter or needing bear protecting in Alaska we have you covered. Check out all the options we have!
Our rifles aren’t just built — they’re engineered to outlast and outperform.
Thermal Fit Barrels
We heat the billet upper to a precise temperature so the barrel extension thermally locks into the receiver as it cools. That interference fit turns the barrel and upper into a single rigid assembly, cutting barrel shift and improving harmonics. The result: bolt-rifle-level accuracy and a more consistent point of impact under sustained fire and after maintenance.
Frictionless Upper Receiver
Our 7075-T6 billet uppers are machined and precision-ground to ultra-tight tolerances, then matched to an ArmorLube-coated BCG. That combination dramatically reduces internal friction and carbon hang-ups, producing smoother bolt velocity, less wear on contact surfaces, and more consistent cycling — especially during high-round-count use.
Proprietary Flat-Wire Buffer Spring
Our cryo-treated flat-wire buffer spring and matched buffer increase forward pressure and resist fatigue far longer than conventional round wire. Tested well past industry norms, it eliminates the spring “twang,” evens out recoil impulse, and preserves consistent lockup and ejection over hundreds of thousands of cycles — a cornerstone of long-term reliability.
Dont Just Take Our Word For it
Video Review by Tactical Considerations
Ready for hard use: Tactical Considerations’ Mike puts the Mitchell Defense DOC Ambi-bolt release through its paces. Flawless range performance, veteran-grade build — watch the full review and see the build list.
Video Review by Range Day Bro Pipehitter
Range Day Bro put the Mitchell Defense MD10 Pipe Hitter (6.5 Creedmoor) on target: sub-MOA at 100 yds and a 4×4 plate at 450.
Video Review by Parellel Defense
Parallel Defense’s SM & Jay ran 1,000 rounds suppressed through the Mitchell Defense rifle — ambi controls, 7075 billet, thermal-fit barrel, and duty-grade parts. Watch the full review.
Pat M.
Verified ownerGood Company, shipped fast, and Customer Service actually ANSWERS THE PHONE! I had a question before I ordered, spoke to some guy named Nathan. He helped me out, but could use more training. This is a good American Company that makes Great rifles.
1 year ago
Steven S.
Verified ownerGreat company with great products
5 months ago
Chris P.
Verified ownerMitchell Defense has his a home run with their GWOT shorty. This rifle runs flawlessly and shoots great suppressed. Fit and finish are top notch. Worth every penny. For a serious do anything go to rifle, choose Mitchell Defense. Shipping was fast and reasonable, the website is easy to navigate and customer service lets one speak with a real person instead of an automated recording.
1 year ago
Vincent H.
Verified ownerItem was received in a short amount of time, but I did not receive a tracking email when the item shipped.
1 year ago
Tim
Verified owner
1 year ago
Mitch G.
Verified ownerGreat company and Nathan is outstanding to work with.
2 months ago
Randy
Verified ownerSeemed to ship a little slow but not bad. Case is nice kinda wish you got two mags or one mag to match gun in color
1 year ago
Ryan Fraker
Reviewer
We met the owner of Mitchell Defense at SHOT Show last year. The guy is truly passionate about the gun industry and giving back. After several conversations, I believe he genuinely cares about making our industry better and furthering our future. Totally inline with Team 144 values. 10/10! -Ryan Fraker , Team 144
4 months ago
Anonymous
Reviewer
Good people. Had some questions because I'm new to this kind of gun, and they took the time to explain things and make recommendations for accessories. If what you want isn't in stock, just keep checking, it'll probably be back in a day or 2. I saw my gun go in and out of stock a dozen times before I was finally ready to pull the trigger. Then it was out of stock. But it came back in the next day.
1 year ago
Buddy Bonsell
Verified ownerThe DOC MD15 and Sand Cutter BCG's are awesome. The FDE finish is phenomenal. Got all the colors now! After the range, I'm sure I'll be driving tacks again, lime my DOC GWOT And the DOC SOIDC!!
6 months ago
James B.
Reviewer
6 months ago
Andrew S.
Verified ownerGreat products, great company HIGHLY recommend.
6 months ago
Jordan F.
Verified ownerEasy to navigate. Great product info.
1 year ago
jeremy britto
Verified owner
1 year ago
Justin Y.
Verified ownerI was surprised to get an e-mail from the company owner, Nathan Mitchell. Dealing with Mitchell Defense was spectacular, as I changed things a few times.
5 days ago
Chris
Verified ownerMitchell Defense is a no-brainer: The quality is impeccable and the customer service is like going back to a time when great service existed and people took pride in their products. I'll be ordering from them again at least one more time before the August 2026 semi-auto "ban" in Colorado.
5 months ago
Travis
Verified ownerTop quality
4 months ago
HERE’S
OUR
STORY.
Mitchell Defense is a veteran owned and operated manufacturer in Glenside PA. We specialize in the AR platform. We make rifles in the AR10, AR15, AR9 platform and every rifle was designed to be accurate, reliable and durable. There is nothing standard about our rifles and almost every part of our rifles have been enhanced in some way for reliability and durability.